The following special custom cams have been dynoed and the proven horsepower/torque numbers are listed. All require an adjustable valve train.
[email protected] Du[email protected] Gross/Lift Lobe/Sep
267/274 300/307 .696/.696 108/104
This mechanical roller cam in a 496 cu in 455 Olds engine with DMR ported aluminum heads made 613.3 horsepower @ 5600 RPM and 618.7 torque @ 4600 RPM using 12:1 compression on 110 octane pump gas. Needs ported heads that flow in the 300 CFM range. Excellent for strip use. Needs a 3700+ converter, intake, headers and 4.56+ gears. Rough idle.
